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Three-dimensioned Truss.

Case II.   Nut at E.R is the first diagram and S the second
giving stresses

in Ax B = 92 tons,    and in a b and a c each = 47 tons.

Case III, is worked entirely from the end view. 100 tons is to, be
distributed on the fore legs, causing no stress in the hack leg. Then
by diagram T, stresses are

in a b and ac each  51 tons.